Hanna Instruments HI5521 Laboratory Research Grade Benchtop pH/mV and EC/TDS/Salinity/Resistivity Meter

• The HI5521 is a benchtop pH/ORP and EC/TDS/Salinity/Resistivity meter for advanced research that is fully programmable and has a big color LCD, capacitive touch keys, and a USB connector for connecting to a computer.
• The HI5521 is a two-channel meter that enables simultaneous measurement of EC or related parameters on one channel and pH or ORP on the other. For use with the extensive selection of pH and ORP electrodes that Hanna Instruments provides, Channel 1 features a BNC connection. The HI1131B glass body, double connection, combination pH electrode, which functions over a broad temperature range of 0 to 100 °C, is included with the meter. With the standalone HI7662-T temperature probe or the conductivity probe on Channel 2’s built-in temperature sensor, all values are automatically corrected for temperature fluctuations. The HI76312 four-ring conductivity probe, which is included with the HI5521, performs over a broad range from 0.000 S/cm to 1000.0 mS/cm*. The meter can be configured to either fixed range, where it will only display readings in S/cm or mS/cm, or auto-ranging, where it will select the right conductivity range from seven ranges. A built-in temperature sensor automatically adjusts all values for temperature fluctuations. The range of the temperature correction coefficient is 0.00 to 10.00%/°C.
• The HI5521’s pH meter may be calibrated up to five points using either five custom buffers or eight pre-programmed buffers. The HI5521 comes with Hanna’s exclusive CAL CheckTM to notify the user of potential issues during pH calibration. During calibration, indicators such as “Electrode Dirty/Broken” and “Buffer Contaminated” are presented. After calibration is finished, a percentage representing the overall probe condition based on the offset and slope characteristics of the electrode is shown. By using the Good Laboratory Practice (GLP) display option, it is possible to examine the calibration data at any moment along with the current measurement, including the date, time, buffers utilized, offset, and slope.
• The HI5521 can be calibrated up to four points as an EC/TDS/Salinity/Resistivity meter with a choice of six pre-programmed conductivity standards or user defined custom standards. Conductivity is used to calibrate resistance, TDS, practical salinity (PSU), and the natural seawater scale. The HI7037 salinity standard is used to calibrate the % NaCl to a single point. By using the Good Laboratory Practice (GLP) display option, it is possible to obtain the calibration data at any moment along with the current measurement, including the date, time, standards used, offset, and cell factor.
• The HI5521 is set up to test high purity water used in the production of pharmaceuticals using the three steps of the USP 645> technique. A report is generated and can be stored once a step is reached. Up to 200 reports can be saved and transmitted to a computer running Windows® using the USB interface.
• Automatic, manual, and AutoHold logging are the three possible configurable logging options. Up to 100,000 data points, with a maximum of 50,000 recordings per lot on each channel, can be recorded and sent to a computer for analysis and storage.

Features at-a-glance

Highly Customizable User Interface – The user interface of the HI5521 allows the user to show measurements in various modes: basic measurement with or without GLP information, real-time graphing, and logging data. Calibration stability criteria can be adjusted from fast, moderate, and accurate. Programmable alarm limits can be set to inside or outside allowable limits.

Color Graphic LCD – The HI5521 features a color graphic LCD with on-screen help, graphic, and custom color configurations. The display allows for real-time graphing and the use of virtual keys provide for an intuitive user interface.

Capacitive Touch – The HI5521 features sensitive capacitive touch buttons for accurate keystrokes when navigating menus and screens. There are four dedicated keys that are used for routine operations including calibration and switching measurement modes and four virtual keys that change based upon use. The capacitive touch technology ensures the buttons never get clogged with sample residue.

Four Ring Conductivity Probe – All readings are performed with the HI76312 four-ring conductivity probe that has a built in temperature sensor for automatic temperature correction.  The four rings are made with platinum and the body of the electrode is made of Polyetherimide (PEI) plastic that is resistant to many harsh chemicals.  The four-ring design allows for this probe to be used over a wide range of measurements.

Choice of Calibration – Automatic buffer recognition, semiautomatic, and direct manual entry pH calibration options are available for calibrating up to five points, from a selection of eight standard buffers and up to five custom buffers.  For the conductivity channel the calibration can be set to automatic standard recognition or user entry along with a choice of single or multi-point. Calibration can be performed up to four points when multi-point is selected.

CAL Check™ – CAL Check™ alerts users to potential problems during the calibration of the pH electrode. Indicators include “Electrode Dirty/Broken,” “Buffer Contaminated,” electrode response timeand the overall probe condition as a percentage that is based on the offset and slope characteristics.

GLP Data – HI5521 includes a GLP Feature thatallows users to view calibration data and calibration expiration information at the touch of a key. Calibration data include date, time, standards used for calibration.

Data Logging – Three selectable logging modes are available on the HI5521: automatic, manual, and AutoHold logging. Automatic and manual logs up to 100 lots with 50,000 records max/lot, with up to 100,000 total data points. Automatic logging features the option to save data according to sampling period and interval.

Data Transfer – Data can be transferred to a PC with USB cable and HI92000 software (both sold separately).

Contextual Help – Contextual help is always available through a dedicated “HELP” key. Clear tutorial messages and directions are available on-screen to quickly and easily guide users through setup and calibration.  The help information displayed is relative to the setting/option being viewed.